package com.itheima.service.impl;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.BaseContext;
import com.itheima.common.CustomException;
import com.itheima.dto.OrdersDto;
import com.itheima.entity.*;
import com.itheima.mapper.OrderMapper;
import com.itheima.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;//获取下单人信息name

    @Autowired
    private AddressBookService addressBookService;//查地址信息

    @Autowired
    private OrderDetailService orderDetailService;//订单详细信息

    @Autowired
    private OrderService orderService;
//orderService
    /**
     * 用户下单
     * @param orders

    2个save
    order  save  ;orderDetail    saveBatch
     */
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获得当前用户id
        Long userId = BaseContext.getCurrentId();
        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);
        if(shoppingCarts == null || shoppingCarts.size() == 0){
            throw new CustomException("购物车为空，不能下单");
        }
        //查询用户数据
        User user = userService.getById(userId);
        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook == null){
            throw new CustomException("用户地址信息有误，不能下单");
        }
        long orderId = IdWorker.getId();//订单号
        /*原子操作：确保线程安全。。订单总金额*/
        AtomicInteger amount = new AtomicInteger(0);//订单总金额
        //组装订单明细信息
        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());
        //组装订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);

        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);
        //清空购物车数据
        shoppingCartService.remove(wrapper);
    }

//    @Override
//    public List<OrderDetail> getOrderDetailsByOrderId(Long orderId) {
//        LambdaQueryWrapper<OrderDetail> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(OrderDetail::getOrderId, orderId);
//        List<OrderDetail> orderDetailList = orderDetailService.list(queryWrapper);
//        return orderDetailList;
//    }


//    @Transactional
//    @Override
//    public void ordersDtoPage(Integer page, Integer pageSize) {
//        Page<Orders> pageInfo = new Page<>(page, pageSize);
//
//        Page<OrdersDto> ordersDtoPage = new Page<>();
//
//        //构造条件构造器
//        LambdaQueryWrapper<Orders> queryWrapper = new LambdaQueryWrapper<>();
//
//        //添加排序条件
//        queryWrapper.orderByDesc(Orders::getOrderTime);
//
//        //进行分页查询
//        orderService.page(pageInfo,queryWrapper);
//
//        //对象拷贝
//        BeanUtils.copyProperties(pageInfo,ordersDtoPage,"records");
//
//        List<Orders> records=pageInfo.getRecords();
//
//        List<OrdersDto> list = records.stream().map((item) -> {
//            OrdersDto ordersDto = new OrdersDto();
//
//            BeanUtils.copyProperties(item, ordersDto);
//            Long Id = item.getId();
//            //根据id查分类对象
//            Orders orders = orderService.getById(Id);
//            String number = orders.getNumber();
//            LambdaQueryWrapper<OrderDetail> lambdaQueryWrapper=new LambdaQueryWrapper<>();
//            lambdaQueryWrapper.eq(OrderDetail::getOrderId,number);
//            List<OrderDetail> orderDetailList = orderDetailService.list(lambdaQueryWrapper);
//            int num=0;
//
//            for(OrderDetail l:orderDetailList){
//                num+=l.getNumber().intValue();
//            }
//
//            ordersDto.setSumNum(num);
//            return ordersDto;
//        }).collect(Collectors.toList());
//
//        ordersDtoPage.setRecords(list);
//    }
}
